Yamaha CS80

Hi David,

All three fuses are good and all my supply voltages are there. As I said, I know the KAS 
board is good because I replaced the entire board after this problem started and its still 
there.

I also tried calibrating the KAS board and I'm getting very strange things going on. For 
instance on wire TU the calibration says I should be getting 4.v for a reference voltage but 
I'm getting almost 13v. None of the VR's are doing anything either.

--- In yamahacs80@yahoogroups.com, David Rogoff <david@...> wrote:
>
> I've had CS80s do this when I've shorted something and blown one of the 
> DC fuses in the power supply. Are you sure all the supply voltages are 
> there?
> 
> Heath Finnie wrote:
> > This is a big question here. The CS-80 I'm working on will barely change pitch all the 
way up 
> > the keyboard now. Some keys will play a little lower but not much. Now here are the 
> > symptoms:
> >
> > I replaced most all the IC's on the sub board. I replaced the entire KAS board with a 
working 
> > one. Problem does not change.
> >
> > The pitch ribbon is having no effect on pitch. Neither is the pitch knob.
> >
> > The channel 2 detune IS working as is the footing sliders.
> >
> > Ring modulator is working, sub oscillator is working and so is all the waveforms.
> >
> > Any of the tech guys able to help?
> >
> > 	
> >
>